Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20040078505 A1
Publication typeApplication
Application numberUS 10/357,367
Publication dateApr 22, 2004
Filing dateFeb 4, 2003
Priority dateOct 21, 2002
Also published asUS6944701
Publication number10357367, 357367, US 2004/0078505 A1, US 2004/078505 A1, US 20040078505 A1, US 20040078505A1, US 2004078505 A1, US 2004078505A1, US-A1-20040078505, US-A1-2004078505, US2004/0078505A1, US2004/078505A1, US20040078505 A1, US20040078505A1, US2004078505 A1, US2004078505A1
InventorsGordon Yu, Jung Chang, Forli Wen
Original AssigneeC-One Technology Corporation, Pretec Electronics Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Portable USB device built with rechargeable functional apparatus
US 20040078505 A1
Abstract
A portable USB device built with rechargeable functional apparatus is disclosed. The portable USB device has a USB connector for being inserted into a socket of a host device. A USB device module is powered by the +5V pin on the USB connector and activated to perform data exchange via the D+ and D− pins on the USB connector when the USB connector is coupled to the host device, so as to provide a first specific function to the host device. A charge circuit charges the rechargeable battery via the +5V pin when the USB connector is coupled to the host device. A functional apparatus is powered by the rechargeable battery so as to provide second specific function different from the first one when the USB connector is not coupled to the host device.
Images(4)
Previous page
Next page
Claims(9)
What is claimed is:
1. A portable USB device built with rechargeable functional apparatus, comprising:
a USB connector having +5V, D+, and D− pins for being inserted into a socket of a host device;
a USB device module powered by the +5V pin and activated to perform data exchange via the D+ and D− pins when the USB connector is coupled to the host device, so as to provide a first specific function to the host device;
a rechargeable battery;
a charge circuit for charging the rechargeable battery via the +5V pin when the USB connector is coupled to the host device; and
a functional apparatus powered by the rechargeable battery so as to provide second specific function different from the first one when the USB connector is not coupled to the host device.
2. The portable USB device built with rechargeable functional apparatus as claimed in claim 1, wherein the USB device module provides specific I/O function and data storage space, so that, when the USB connector is coupled to the host device, the USB device module is powered via the +5V pin and controlled via the D+ and D− pins to achieve I/O function and data exchange.
3. The portable USB device built with rechargeable functional apparatus as claimed in claim 2, wherein the functional apparatus is an illuminating apparatus.
4. The portable USB device built with rechargeable functional apparatus as claimed in claim 3, further comprising a push button being operable to supply power from the rechargeable battery to the illuminating apparatus.
5. The portable USB device built with rechargeable functional apparatus as claimed in claim 3, wherein the illuminating apparatus is a LED or a low power illuminator.
6. The portable USB device built with rechargeable functional apparatus as claimed in claim 5, wherein the LED is disposed at one end of the USB device and the push button is located adjacent to the LED.
7. The portable USB device built with rechargeable functional apparatus as claimed in claim 1, wherein the functional apparatus is a laser emitting circuit.
8. The portable USB device built with rechargeable functional apparatus as claimed in claim 1, wherein the functional apparatus is an alarming circuit.
9. The portable USB device built with rechargeable functional apparatus as claimed in claim 1, wherein the functional apparatus is a remote control circuit.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    1. Field of the Invention
  • [0002]
    The present invention relates to a portable USB (universal serial bus) devices and, more particularly, to such a portable USB device built with a rechargeable functional apparatus.
  • [0003]
    2. Description of Related Art
  • [0004]
    Over the past several decades there has been a considerable growth in electronics. The trend of electronic products is compact, portable, low power, and/or multifunctional in order to bring a great convenience to vast consumers. The electronic products comprise, for example, USB card reader, USB wireless device, and portable USB hard disk, and all of which are portable. In using these electronic devices, the user simply inserts the portable USB hard disk in an USB socket of a personal computer, notebook computer, PDA (personal digital assistant) or digital camera for reading data therefrom, writing data into the portable USB hard disk, or for wireless transmission. Typically, the portable USB hard disk has a size about a thumb with a storage capacity of up to hundreds of MB. Typically, the memory of the portable USB hard disk is implemented as a flash memory. In the case that a USB connector of the portable USB hard disk is coupled to the USB socket of the associated device, power may be fed from the device to the portable USB hard disk via a power pin (+5V) of the USB connector for maintaining a normal operation of the flash memory. Furthermore, data stored in the flash memory can be accessed via data pins (D+ and D−) of the USB connector. In other words, the flash memory operates as a hard disk of a conventional computer.
  • [0005]
    As stated above, the USB hard disk has advantages of portability, compactness, being easy to use as a hard disk. Thus, continuing improvements in the portable USB hard disk are constantly being sought.
  • SUMMARY OF THE INVENTION
  • [0006]
    An object of the present invention is to provide a portable USB device built with rechargeable functional apparatus for enhancing the functionality.
  • [0007]
    To achieve the object, the portable USB device of the present invention comprises: a USB connector having +5V, D+, and D− pins for being inserted into a socket of a host device; a USB device module powered by the +5V pin and activated to perform data exchange via the D+ and D− pins when the USB connector is coupled to the host device, so as to provide a first specific function to the host device; a rechargeable battery; a charge circuit for charging the rechargeable battery via the +5V pin when the USB connector is coupled to the host device; and a functional apparatus powered by the rechargeable battery so as to provide second or more specific functions different from the first one when the USB connector is not coupled to the host device.
  • [0008]
    Other objects, advantages, and novel features of the invention will become more apparent from the detailed description when taken in conjunction with the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0009]
    [0009]FIG. 1 is a block diagram of circuitry of a portable USB device according to the invention;
  • [0010]
    [0010]FIG. 2 is a detailed circuit diagram of the charge circuit shown in FIG. 1; and
  • [0011]
    [0011]FIG. 3 is a perspective view of the FIG. 1 USB device implemented as a portable USB hard disk.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0012]
    With reference to FIG. 1, there is shown the circuit blocks of a portable USB device built with rechargeable functional apparatus in accordance with the invention, which comprises a USB connector 11, a USB device module 17, a charge circuit 13, a rechargeable battery 14, a functional apparatus 18, and a push button 16. The portable USB device may be a USB card reader, a USB wireless device, or portable USB hard disk. In this embodiment, a portable USB device built with a rechargeable illuminating apparatus is provided, and thus the USB device module 17 is a flash memory module 12 and the functional apparatus is an illuminating apparatus 15. The USB connector 11 can be inserted into a USB socket of a host device (not shown). As such, power may be fed from the host device to the portable USB hard disk via a power pin (+5V) of the USB connector 11 for maintaining a normal operation of the flash memory module 12. Furthermore, data in the flash memory 12 may be accessed via data pins (D+ and D−) of the USB connector 11, so as to provide the data storage function of a hard disk.
  • [0013]
    In accordance with the specification of USB 1.* or 2.0, the rated current of the +5V pin is 500 mA. In an implementation, the rated current is more than 500 mA due to the consideration of the circuitry design of the circuit board (such as ferrite bead). However, the operating current of the flash memory module 12 is typically lower than 100 mA. As such, the current can be supplied to the charge circuit 13 via the +5 V pin for charging the rechargeable battery 14 in addition to supplying the flash memory module 12 without adversely affecting a normal data reading/writing operation of the flash memory module 12.
  • [0014]
    With reference to FIG. 2, the charge circuit 13 comprises a charge waveform control circuit 131, a comparison circuit 132, a battery level detection circuit 133, a charge control logic circuit 134, and a bias and reference voltage generation circuit 135. In a case that the portable USB device is coupled to the host device, power may be supplied to the rechargeable battery 14 (i.e., charging) via the +5 V pin as commanded by the charge waveform control circuit 131 when a voltage of the rechargeable battery 14 detected by the battery level detection circuit 133 is lower than a predetermined voltage generated by the bias and reference voltage generation circuit 135. The charging automatically stops when a charge voltage of the rechargeable battery 14 has risen to be equal to the predetermined voltage as compared by the comparison circuit 132.
  • [0015]
    The charge circuit 13 is formed on an IC (integrated circuit) chip with a current consumption less than 50 mA. Power output of the rechargeable battery 14 is smaller than 1 W. Preferably, the rechargeable battery 14 is implemented as a lithium cell having a rated voltage of 3.6 V and a charge current about 56 to 280 mA. Hence, the charge circuit 13 may charge the rechargeable battery 14 without adversely affecting a data reading/writing operation of the flash memory module 12. In a case that the USB connector 11 of the portable USB hard disk built with an illuminating apparatus is inserted into the socket of the host device for reading data from the host device or writing data into the portable USB hard disk, the rechargeable battery 14 can be charged until full if the voltage of the rechargeable battery 14 is low. Once the voltage of the rechargeable battery 14 is full, the portable USB hard disk can be used as an illuminating device when it is not coupled to the host device.
  • [0016]
    With reference to FIG. 1 again, the rechargeable battery 14 is activated to supply power to the illuminating apparatus 15 by pressing the push button 16. Preferably, the illuminating apparatus 15 is a LED (light-emitting diode) or a low power illuminator. As shown in the perspective view of FIG. 3, the LED is disposed at one end of the portable USB hard disk and the push button 16 is located adjacent the LED 15. In use, the user can simply press the push button 16 for activating the LED to illuminate.
  • [0017]
    In view of the foregoing, it is known that the present invention provides a functional apparatus 18 powered by the rechargeable battery 14 in a portable USB device, so that the portable USB device still has a specific function even though it is not inserted in a host device and carried by the user. Furthermore, there is no additional charge connector required on the portable USB device since charge capability is incorporated in the USB connector 11. In addition, the functional apparatus 18 may be implemented as a laser emitting circuit, alarming circuit, or remote control circuit other than the above mentioned illuminating apparatus 15. As such, the portable USB device can be functioned as a laser pointer, an alarm device, or a remote control.
  • [0018]
    Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US6357011 *Jul 15, 1998Mar 12, 2002Gateway, Inc.Bus-powered computer peripheral with supplement battery power to overcome bus-power limit
US6614206 *May 23, 2002Sep 2, 2003Palm, Inc.Universal USB charging accessory
US6636158 *Sep 14, 2000Oct 21, 2003Sony CorporationInformation processing apparatus and method, and program storage medium
US6665801 *Jan 27, 2000Dec 16, 2003Symbol Technologies, Inc.Method and apparatus for charging a self powered USB device at different charge rates according to the charge level of a rechargeable element on the device
US6678535 *Jun 30, 2000Jan 13, 2004International Business Machines CorporationPervasive dock and router with communication protocol converter
US6774604 *Jul 25, 2002Aug 10, 2004Seiko Epson CorporationPower control circuit, electronic instrument, and charging method
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7894635Sep 10, 2005Feb 22, 2011Rehoboth Tech Co., Ltd.Iris identification system integrated USB storage device
US8027165Jul 8, 2004Sep 27, 2011Sandisk Technologies Inc.Portable memory devices with removable caps that effect operation of the devices when attached
US9225200 *Nov 13, 2012Dec 29, 2015Quanta Computer Inc.Electronic device with connection interface supporting signal communication and charging operation
US9727111 *Jun 11, 2014Aug 8, 2017Huawei Device Co., Ltd.Control device for current switching and electronic device
US20050240692 *Apr 27, 2004Oct 27, 2005I-Ying LiUSB laser pen drive
US20060176146 *Feb 9, 2005Aug 10, 2006Baldev KrishanWireless universal serial bus memory key with fingerprint authentication
US20060226225 *Jun 22, 2005Oct 12, 2006Ching-Horng HsiaoMultifunctional light beam pointer
US20070005837 *Jun 29, 2005Jan 4, 2007Chen Martin YPersonal portable storage device
US20080065806 *Feb 8, 2007Mar 13, 2008Samsung Electronics Co., Ltd.Function-extended serial apparatus and electronic device having the same
US20080130959 *Sep 10, 2005Jun 5, 2008Shinho KimIris Identification System Integrated Usb Storage Device
US20140049112 *Nov 13, 2012Feb 20, 2014Quanta Computer Inc.Electronic device with connection interface supporting signal communication and charging operation
US20140310545 *Jun 11, 2014Oct 16, 2014Huawei Device Co., Ltd.Control Device for Current Switching and Electronic Device
CN102236771A *Apr 22, 2010Nov 9, 2011鸿富锦精密工业(深圳)有限公司读卡器
CN105913502A *May 19, 2016Aug 31, 2016吕艺Electronic bus charging device
DE102007037890A1 *Aug 10, 2007Feb 12, 2009Schätz, BerndSpeicher-Element
EP1805633A1 *Oct 11, 2005Jul 11, 2007Shinho KimIris identification system integrated usb storage device
EP1805633A4 *Oct 11, 2005Jul 23, 2008Shinho KimIris identification system integrated usb storage device
EP2209069A2 *Nov 12, 2009Jul 21, 2010Sinitec Vertriebsgesellschaft mbHAssembly with a computer and electronic peripheral device and computer, peripheral device and method for supplying energy to computer
EP2209069A3 *Nov 12, 2009Aug 25, 2010Sinitec Vertriebsgesellschaft mbHAssembly with a computer and electronic peripheral device and computer, peripheral device and method for supplying energy to computer
EP2860627A4 *Jul 31, 2013Aug 5, 2015Zte CorpActive usb device and switching method for operating mode thereof
Classifications
U.S. Classification710/300
International ClassificationG06F13/00, G06F1/26, G06F12/00
Cooperative ClassificationG06F1/266
European ClassificationG06F1/26P
Legal Events
DateCodeEventDescription
Feb 4, 2003ASAssignment
Owner name: PRETEC ELECTRONICS CORP., CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YU, GORDON;CHANG, JUNG TA;WEN, FORLI;REEL/FRAME:013733/0741
Effective date: 20030110
Owner name: C-ONE TECHNOLOGY CORP., TAIWAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YU, GORDON;CHANG, JUNG TA;WEN, FORLI;REEL/FRAME:013733/0741
Effective date: 20030110
Mar 9, 2009FPAYFee payment
Year of fee payment: 4
Mar 13, 2013FPAYFee payment
Year of fee payment: 8
Apr 21, 2017REMIMaintenance fee reminder mailed
Oct 9, 2017LAPSLapse for failure to pay maintenance fees
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.)
Oct 31, 2017FPExpired due to failure to pay maintenance fee
Effective date: 20170913